<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.js"></script>
</head>
<body>
    <input type="text" id="app">
    <script>
        var students = [{
                name: "李四",
                age: "18岁"
            },
            {
                name: "李二",
                age: "11岁"
            },
            {
                name: "李三",
                age: "19岁"
            },
            {
                name: "王五",
                age: "22.5岁"
            },

        ]
        $("#app").keyup(function (event) {
            if(event.keyCode==13){
                var keyword = $(this).val();
                var res = students.filter(item=>{
                    return item.name.includes(keyword);
                })
                console.log(res)
                $(this).val('')
            }
          })
        </script>
</body>
</html>